HYDROGEN GENERATOR AND FUEL CELL POWER GENERATOR

摘要

There is provided a hydrogen generator that prevents supply of droplets to a reforming catalyst layer and that exhibits stable performance. The hydrogen generator includes a water evaporation unit 7 to which a raw gas and water is supplied; a reforming catalyst layer 9 to which a gas mixture is supplied from the water evaporation unit 7; a burner 4 configured to mix and combust a fuel gas with air; a combustion exhaust gas flow channel 16 which is provided on an inner side of the water evaporation unit 7 and through which the combustion exhaust gas flows; and a conversion catalyst layer 10 which is disposed on an outer side of the water evaporation unit 7 and to which a reformed gas is supplied. The water evaporation unit 7 includes double cylinders 100 and 101 and a helical round bar 18 sandwiched between the cylinders 100 and 101, and a pitch of the helical round bar 18 in a downstream portion of the water evaporation unit 7 is made smaller than a pitch of the helical round bar 18 in a portion of the water evaporation unit 7 except the downstream portion thereof.